Hose-making machine.



Patented 12, 1918.

2 SHEETS-SHEET 1.

S. J. SILL. H osE MAKIG MACHINE. APPLICATION HLED IAN.,2.1913.

S. J. SILL.

Hose MAKING MACHINE.

Patented Mar. 12,1918.

2 SHEETS-SHEET 2..

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SAMUEL J. sILL, E BUFFALO, NEW Your; Assrenon 0E oN'EJiA'ILE To HERBERT. n.

HEWITT, 0E BUFFALO, NEW YORK.

HOSE-MAKING MACHINE.

Specication of Letters Patent. Patented DJI-air. 12, 1918.V

Application led January 2, 1913. Serial No. 739,877.. i

To all ywhom t may concern j Be it known that I, SAMUEL J, SILL, a citizen of the `United States, and a resident of Buffalo, county of Ffrie, and State of New York, have invented Certain new and useful Improvements in Hose-Making Machines, of which the following is a full, clear, and eX act description.

The invention relates to machines for making short lengths of flexible rubber hose, such as are commonly employed as coupling pipes in railway air-brake systems, and which hose are formed by wrapping a plurality of plies or layers ofteXtile fabric -upon a mandrel and over a central core or tube of raw rubber, the plies of fabric being ordinarily covered with an outer casing or sheet of raw rubber and the whole thereafter submitted to the vulcanizing process. The present invention seeks to provide simple and Veffective machinery for forming short lengths of hose having enlarged ends for receiving the nipples of metal couplings which are attached to the ends of the hose, the hose being formed, prior to the vulcanization, upon a mandrel having enlarged ends. A further object of the invention seeks to provide a machine in which the teX- tile fabric, which is wound upon the mandrel over the central core or tube of raw rubber thereon, will be drawn or forced outwardly over the enlarged end portions of the mandrel and thus snugly wound in position Awithout wrinkling. The invention is in the nature of an y improvement upon prior letters patent of the United States for hose making machines, issued April 30, 1912, No. 1,024,604, and consists in the novel features of construction hereinafter 'set forth, illustrated inthe preferred form in the accompanying drawings and -more particularly pointed out in the appended claims.

In the drawings,`Figure 1 is a side elevation of the improved hose making machine. Fig. 2 is an end view. Fig. 8 is a detail section on an enlarged scale on the line 3 3 of Fig. 1. Fig. 4 is a detail view on an enlarged scale on the lines M of Figs. 2 and 5. Fig. 5 is a section on the lines 5-5 of Figs. 1 and 4.

The improved machine comprises a bedV rolls 4. These rolls have end journals 5 which are mounted in suitable bearings on the bed plate 1, and, upon the ends of the inner journals, are fixed two gear wheels 6 (see Fig. 3) which mesh with a common drive gear 7. The latter gearl or pinion is i'ixed to a counter shaft 8 which is journaled in suitable bearings on the under side of the bed plate 1. A relatively large gear 9 on this shaft meshes with a pinion 10 on a drive shaft 11. The shaft 11 is journaled on the lower endsl of a, pair of brackets 12 which are secured to and depend from the bed plate 1. The outer end of this shaft is journaled in a goose-neck bracket 13 which is secured to and projects outwardly and downwardly from one end of the bed plate.

A drive pulley 14 is loosely mountedfon the shaft and is provided at one end with a clutch member 15. A coperating 4clutch member 16 is keyed to the shaft 11 and is provided with an annular groove 17 adapted to receive pins 18 on the lower yoked end of a shift vlever 19. The latter is pivoted upon a bracket 20 which projects from the endof the machine. The pulley 14 is driven from any suitable'source 0f power and by means of the clutch lever 19, the main drive shaft 11 and the supporting or driving rolls 4 can be thrown into and out of operation.

VA pair of standards 21 are mounted upon the bed plate at points adjacent the ends of the rolls 4 and are connected at their upper ends by a transverse member 22. The standards are provided with guide ways"23 for a pair of bearing blocks 24. An upper pressure roll 25 is provided with end journals 26 which are mounted inthe lower portions of the bearing blocks 24. These blocks are connectedl by a transverse yoke 27 and the yoke is centrally pivoted to a shifter rod 28.

- By means of the shifter` rod 28 and yoke 27, the upper pressure roll 25 is moved to and from the .lower supporting or driving rolls 4, so that the mandrel upon which the vlength of hose is formed can be placed in or removed from position' between the rolls. Any suitable means may be provided for shifting the upper roll through the medium of the rod 28 and for holding the same in position to exert pressure upon the mandrel and the material wound thereon. By pivoting the roller supporting yoke 27 'to the shifter rod 28, a slightV rocking vmovement is` allowedy to the roll 25 so that the pressure exerted thereby may be uniformly dise tributed throughout its length.

In the construction shown, the shifter rod is connected to the piston of a motor cylinder 29 which is mounted upon the central portion of the cross member 22. r pipe 30 supplies air. or other motive iiuid under pressure to the cylinder, and valve operated by a handle 3l fontrols the admission and exhaust of iiuid under pressure to and from the opposite ends of the cylinder. By admit Aingl fluid to the lower end, the roll is raised and by admitting pressure to the upper end of the cylinder7 the ro-ll is depressed and forced Yinto engagement with the material wound upon the mandrel which is carried by the lower supporting` or drivinn` rolls el.

rlhe mandrel see Figs. t and fi) whereon the hose is formed, is preferably hollow to reduce its weight and is provided at one end with a sli en illy enlarged portion 33. A terminal collar )i surrounds the end of the enlarged portion 38 and liXed to the mandrel by a cross pin it its opposite end, the mandrel is provided with a projecting stein of reduced diameter which is prorided at its outer end with a screw threaded portion 37 and, at its inner end, with a plug` rwhieh fits within the hollow mandrel and isV hrinly secured thereto in any suitable manner.- A' sleeve 39 tits over the stem 3 6 and is screw threaded upon the portion 37 thereof. This sleeve, which is thus detachably secured to the mandrel, is of the same diameter as the enlarged 'portion 33 at the opposite end of the mandrel., and the inner end of the sleeve abuts against the body portion of the inandreh as shown. rlhe sleeve is provided with. an enlarged outer end portion or collar t0 which, with the collar 3l, form shoulders ll it the opposite ends of the mandrel. Preferably, indicated, the collar and the enlarged portion or collar l0 are prorided with flattened wrench engaging faces e2, so that the sleeve 39 can be screwed into and out of position.

rfhe main body portions of the bottom, supporting or drire rolls d and of the upper pressure roll are arranged to. cooperate in wrapping the material upon the main portion of the mandrel 3Q. Each of the rolls is proyided with reduced end portions i3 Vwhich overlap the enlarged end portions 33 and 39 at the opposite ends of the inandrel and cooperate therewith in windingthe textile fabric or frietioned duck upon the raw rubber core or tube. The difference in size between the reduced end portions 4173 and the main body of each of the rolls corresponds to the difference in size between the enlarged end portions and the main body of the mandrel7 so that uniform pressure is exerted by the rolls over the entire length of the mandrel between the shoulders el thereof. The material wound upon the mandrel abuts against the shoulders 4l of the mandrel collars and llt), so that these collars assist in forming square ends Upon the hose, the length of hose being determined by the distance apart of the shoulders ll. The size of the collars also preferably corresponds to the size of the enlarged ends of the hose.

Ars showineach of the rolls d, sh and 25 are provided outside of the reduced portions i3 with portions eidwhich are still further reduced in diameter and which extend over the collars Self and 40. The mandrel is held in position between the r lis by a pair Aof guide plates t5. rllhese guide plates are connected by bolts G to the lower ends of the standards 2l. and extend inwardly between the reduced portions el of the rolls, the inner ends rof the guides being shaped to extend orer'these reduced end portions and engage the @nos of the mandrel. ln this way, the mandrel is accurately held in position between the rolls and prevented from moving in endwise ydire tion, so that the ma! terial is accurately wound thereon. At the same time., the mandrel is free to move vertically., relatively to the guide plates, as the diameter of the material wound thereon increases.

ln order to insure the smooth windingl of the fabric or frictioned duck over the enlarged end portions 33 and 89 of the mandrel, one of t-he rolls, and preferably the upper pressure roll 25 is provided with suitable projections or ribs adapted to force the material outwardly as it is wound on the mandrel. Preferably7 the central enlarged portion of the upper pressure roll 25 is provided with reyersely inclined spiral ribs or threads 47 which extend from the central portion thereof outwardly toward its reduced ends 43. These ribs or threads are rounded, as shown, so that they will not tear 'the fabric but, as the latter is wound upon the mandrel, the upper pressure roll is rotated in suca direction that it draws the layer of fabric outwardly from the central portion of the mandrel and forces the same smoothly over the shoulders between the main body of the mandrel and the enlarged end portions 33 and 39 thereof.

ln operation, the upper pressure roll is lift-ed by admitting air to the lower end of the cylinder 29. lThe operator then places the mandrel in position over which has been slipped a core or tube i8 of soft rubber. This tube or sleeveof soft rubber lits between the shoulders 4l of the mandrel and is placed thereon by first removing the sleeve 39 and collar d() and which parts are subsequently replaced. T he mandrel is then put in position upon the lower supporting or driving rolls Lland with its ends snugly engaging' the guides d5. A sheet of frictioned duck 49 of a width substantially equal to the length of the hose or the distance between the shoulders dl, placed upon a guide plate 50 (sec Fig. which is secured to the bed of the machine on one side of the rolls. The leading edge of the layer of fabric or frictioned duck is passed over one of the rollsi and beneath the tube er core on the mandrel. Air under pressure is then admitted to the upper end of the cylinder 29 and the pressure roll lowered. and forced with son e pressure into engagement with the rubber covered mandrel.' The drive rolls 4 are then thrown into operation by shifting the clutch lever 1Q to connect the main drive shaft ll tothe pulley la. The supporting rolls i are then rotated to thereby rotate the mandrel and, through the inediun'i of the latter, to rotate the upper pressure roll rihe revolution of the rolls and mandrel will cause the layer of frictioned duck, (the inner edge of which readily adhereft'o the inner rubber tube 48 to be wound upon the tube on the mandrel, the duck being accurately guided by the shoulders al on the terminal collars 314; Ll0 of the mandrel. As the winding of the layer of fabric proceeds, the portions on opposite sides of the center thereof are crowded outwardly by the reversely arranged spiral ribs 47, so that the fabric is smoothly drawn over the enlarged portions 83 and 39 of the mandrel and the edges of the fabric snugly forced against the shoulders al. As the last portion of the frictioned duck is about to be wound, the operator will lap a sheet of raw rubber over its edge, the sheet being of sufficient width to completely encircle the hose and form an outer cover or jacket therefor. This raw rubbersheet, like the fabric, will be properly wound by the operation of the rolls and smoothly pressed into position over the layers of fabric and between the shoulders -il of the mandrel.

The latter, as stated, are preferably of the same diameter as the enlarged ends of the completed hose. lt will be understood that as the fabric and outer layer of rubber are wound in position, the mandrel and ythe upper pressure roll will rise as the material wound on the former increases in diameter. l.When the winding of the material forming the hose is thus completed, air is admitted to the lower end of the cylinder 29 and the upper pressure roll raised to release the hose. The hose on the mandrel is then wrapped with Tvet cloths and vulcanized. After vulcanization, the sleeve 39 and collare() there on is detached from the mandrel and the completed hose removed therefrom. ln this manner, short hose lengths having enlarged ends are constructed, the enlarged ends being formed during the process of manufacture and not by subsequently stretching the ends of a hose section of uniform diameter. The siretching of the end portions of a hose of uniform diameter tends to 'weakenA the hose at such points, and, as these endpori tions are necessarily subjected to the greatest l amount of wear because attached to the me,.-

lt allie couplings7 the formation oftheenlarged endsbefore vulcanifzation is a decided advantage. A

lt is obvious that numerous changes may be made in the details set forth without departure from the essentials ofthe invention as defined in the claims.

l claim as myV invention zl. In a hose making machine, the combina.- tion with a pair of supporting rolls, means for driving the hose, a pressure roll movable to and from said supportingrolls, a mandrel having enlarged cylindrical ends adapted to be received between said rolls, the latter having correspondingly reduced ends arranged to overlap and coperate with the enlarged ends ofsaid mandrel to wind the fabric thereon, and means engaging the ends of the mandrel to hold the same against endwise movement while permitting the` vertical movement thereof.V

2. A machine of the character described comprising a plurality of Vrolls between which a mandrel having .enlarged ends can be mounted, `said rolls having reduced ends arranged to overlap and coperate with the enlarged ends of the mandrel, and means for imparting rotation to said rolls, one of said rolls having projecting portions arranged to force the fabric wound on the mandrel outwardly over the enlarged end portions thereof, substantially as described. i

3. A machine of the character described comprising a plurality of rolls between whicha mandrel having enlarged ends can be mounted, said rolls having reduced ends arranged to overlap and cooperate with the enlarged ends of the mandrel, and means for imparting rotation to said rolls, the large portion of one of said rolls having reversely arranged spiral ribs for forcing the fabric wound on the mandrel outwardly over the enlarged ends thereof, substantially as described.

il. A hose making machine comprising a pair of supporting rolls, means for rotating the same, and a pressure roll movable to and from said supporting rolls, said rolls being arranged to receive a mandrel having enlarged cylindrical ends between them and having reduced end portions arranged to overlap and coperate with the enlarged vends vof the mandrel, said pressure roll Vhaving projecting portions arranged to force the material wound on the mandrel outwardly over the enlarged end portions thereof, substantially as described.

5. In a hose making machine, the combination of a plurality of rolls, one at least of said rolls being movable to and from the others, means for driving the relatively sta- Cir tionary rolls'2 and a mandrel having en larged cylindrical ends adapted to be mount ed between said rolls7 the latter having corresponding reduced ends arranged to over lap and coperate with the enlarged ends of said mandrel, and one of said rolls having reversely arranged, spiral ribs arranged to force the fabric Wound on the mandrel outwardly over the enla rged ends thereof.

G. In a hose making machine, the combination with a frame7 of a pair of supporting rolls, a pressure roll arranged above said supporting rolls7 means for driving` said supporting rolls, means for moving said top roll tor and from said supporting` rolls, a mandrel having enlarged ends adapted to be received bet-Ween said 'rolls7 the latter having corresponding reduced ends arranged to overlap and cooperate with the enlarged ends of said mandrel, said upper, pressure rollhaving` reversely arranged.. spiral ribs between its reduced end portions for forcing thc fabric Wound on the mandrel ont- Copies of this patent may be obtained for Leseszo vvardly over the enlarged ends thereof, a pivoted yoke supporting said pressure Iroll and shifting means connected to said yoke, substantially as described.

7. ln a hose making machine, the combination of a plurality of rolls, one of said rolls being movable to and from the others, means for driving said relatively stationary rolls, and a mandrel having enlarged c vlindrical end portions and terminal shoulders adapted to be arranged between said rolls, said rolls having reduced ends arranged to overlap and coperate with the enlarged end portions of said mandrel, and said pressure roll having reversely arranged spiral ribs for forcing the fabric Wound on said mandrel outwardly over the enlarged end portions thereof and snugly against its termi nal shoulders, substantially as described.

SAMUEL J. SILL.

Witnesses:

EUGENE J. COLEMAN, GEORGE D. PLUMsTnAD.

five cents each, by addressing the Gommlssioner of @atenta Washington, D. C. 

